Optical power detector with broad spectral coverage, high detectivity, and large dynamic range
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
Letter
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Date
Major/Subject
Mcode
Degree programme
Language
en
Pages
4
Series
Optics Letters, Volume 47, issue 7, pp. 1689-1692
Abstract
Optical power measurements are needed in practically all technologies based on light. Here, we report a generalpurpose optical power detector based on the photoacoustic effect. Optical power incident on the detector's black absorber produces an acoustic signal, which is further converted into an electrical signal using a silicon-cantilever pressure transducer.We demonstrate an exceptionally large spectral coverage from ultraviolet to far infrared, with the possibility for further extension to the terahertz region. The linear dynamic range of the detector reaches 80 dB, ranging from a noise-equivalent power of 6 nW/ √Hz to 600mW (independent of signal averaging time).Description
Funding Information: Acknowledgment. The work was funded by the Academy of Finland (Project numbers 326444 and 314364) and by the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision numbers: 320167 and 320165. Publisher Copyright: © 2022 Optica Publishing Group.
Keywords
Other note
Citation
Rossi, J, Uotila, J, Sharma, S, Hieta, T, Laurila, T, Teissier, R, Baranov, A, Ikonen, E & Vainio, M 2022, 'Optical power detector with broad spectral coverage, high detectivity, and large dynamic range', Optics Letters, vol. 47, no. 7, pp. 1689-1692. https://doi.org/10.1364/OL.455191